A few months back i pulled out those awful Carver Subs and replaced them with a powered 12" BassStation subwoofer hatchback enclosure from Kicker (Kicker 11PH12). Man, what an improvement! The best part is that the box fit perfectly and barely took up any room. I paid about $300 for the box online. I'll post pics soon. Also, i used the space where the Carvers were to hold my DICE and Sirius radio modules.